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Kepler Publishes Astronomia Nova (1609)
In 1609 Kepler published Astronomia nova in Prague, proposing his first two laws of planetary motion from Mars data and overturning the classical cir…
Timeline
- 1600–1605Prague · BohemiaIn Prague, Kepler used the residuals of Tycho Brahe's high-precision Mars observations, repeatedly testing different orbital models, and finally abandoned the traditional circle-and-epicycle system.
- 1609Prague · BohemiaKepler published Astronomia nova in Prague, formally proposing the two laws that planets move in elliptical orbits and sweep equal areas in equal times, marking the birth of modern celestial mechanics.
Sources
- Astronomia nova αιτιοολογητος — Johannes Kepler (1609)
- Kepler's Astronomia Nova — James R. Voelkel (2001)